A childhood belief about birthdays

I believed that when you were one, your birthday was on the 1st of whatever month, and when you were two it was on the 2nd and so on and so forth until you dies, when your birthday was on the last day of the month. I thought that I would die when I was 28 because my birthday is in February. My mom had to explain to me that my birthday would always be on the same day (and she added that I'd only die when I drove her crazy and she ate me. I was scared of her after that).